Hello team I m looking use Prefect at my company While testi

Question

Hello team I m looking use Prefect at my company While testing I noticed that `random` generates the same values between runs I m using Prefect Cloud 1 0 and running a local agent with Prefect 1 2 1 library installed Here s my flow ``` import prefect from prefect import task Flow from random import random task def task1 logger = prefect context get logger random val = random <http logger info|logger info> f random val= if random val lt 0 5 raise Exception with Flow random bug flow as flow task1 flow register project name= ant flows ``` I manually scheduled a run of this flow in Prefect Cloud and I see the random value in the logs However when I schedule another run and any run thereafter it generates the same random value Is this expected

Anthony L · Answer

I tried looking for but couldn t find anything related to this in Prefect s Github issues and Discourse threads

Kevin Kho · Answer

This is not expected but could happen maybe depending on how you trigger the runs How are you triggering the run

Anthony L · Answer

Just through the Prefect Cloud 1 0 UI navigated to my flow clicked on the Run tab and scheduled it to run immediately

Kevin Kho · Answer

Will try one sec

Anthony L · Answer

I even tried restarting my local agent thinking it s related the random s seed value when the agent starts up but same problem when rerunning the flow on the restarted agent

Kevin Kho · Answer

I can replicate I think this has to do with serialization of the task maybe Will look into it and likely open an issue

Anthony L · Answer

Whew I thought I was going crazy Sweet Thanks

Anna Geller · Answer

Yup this is likely either extreme randomness unlikely smile or a serialization issue more likely Can you try using script storage If you register from CLI rather than `flow register ` it will by default use script storage and should then dynamically generate the number I tried that and I m getting different numbers at each run ```from prefect import task Flow from random import random task log stdout=True def rand float random val = random print f random val= with Flow random nr flow as flow rand float ```

Anna Geller · Answer

last 3rd time again a different number ```0 26524578590511527``` ``` packaging prefect flows community 1 0 prefect run name random nr flow watch Looking up flow metadata Done Creating run for flow random nr flow Done Name pink numbat UUID a2d3da01 2be6 47cc b2f9 39b517ea320d Labels annas MBP fritz box Parameters Context URL <https cloud prefect io anna prefect flow run a2d3da01 2be6 47cc b2f9 39b517ea320d> Watching flow run execution 01 56 45 | INFO | Entered state lt Scheduled gt Flow run scheduled 01 56 54 | INFO | Entered state lt Submitted gt Submitted for execution 01 56 55 | INFO | Submitted for execution PID 38051 01 56 55 | INFO | Entered state lt Running gt Running flow 01 56 55 | INFO | Beginning Flow run for random nr flow 01 56 56 | INFO | Task rand float Starting task run 01 56 57 | INFO | random val=0 26524578590511527 01 56 57 | INFO | Task rand float Finished task run for task with final state Success 01 56 57 | INFO | Flow run SUCCESS all reference tasks succeeded 01 56 57 | INFO | Entered state lt Success gt All reference tasks succeeded Flow run succeeded ```

Anthony L · Answer

Registering the flow via CLI instead of `flow register ` fixes the issue on my end Thanks Anna

Kevin Kho · Answer

Oh thanks for mentioning Will open and include that in the issue

Kevin Kho · Answer

Issue <https github com PrefectHQ prefect issues 5744>